Looking for a job

Nikita Rodionov

@nikitarodionov

Message

Java developer building Spring Boot microservices and secure REST APIs, including a payment processing service.

Poland

Message

What I'm looking for

I'm seeking a Software Development Engineer position at Infotree Global Solutions, where I can use my Java and Spring skills to support the development of efficient, reliable backend services for custom CRM systems.

I developed and deployed Java backend applications and microservices as a self-employed developer, using Spring Boot and related Spring technologies to deliver REST-based services. I also used Apache Kafka for event-driven services and PostgreSQL and Redis for data modeling and caching.

For my RESTful Payment Processing Service project, I built payment lifecycle APIs with hexagonal architecture, Stripe integration, and JWT authentication. I added webhook handling and transaction auditing, and achieved about 92% instruction test coverage with JUnit 5, Mockito, and Testcontainers.

Experience

Work history, roles, and key accomplishments

Current

Java Backend Developer (Volunteer)

Current

NeuroN Foundation - Acorn Project

Jul 2026 - Present (3 months)

Applied software design principles and design patterns in user and notification services in a microservices-based product to improve modularity and maintainability. Diagnosed bugs, debugged and improved existing code, and wrote unit tests to increase reliability and support high-quality delivery.

Java Microservices Design Patterns Unit Testing AWS Agile Jira Git Slack

Current

Backend Java Developer

Current

Self-employed

May 2025 - Present (1 year 5 months)

Developed and deployed Java backend applications and microservices with Spring Boot, Spring MVC, Spring Security, and Spring Data JPA, delivering scalable REST-based services. Utilized asynchronous messaging and data streaming with Apache Kafka to support event-driven architecture and improve service decoupling and system integration.